681383385064 has 96 divisors (see below), whose sum is σ = 1418128980480. Its totient is φ = 306286396416.

The previous prime is 681383385061. The next prime is 681383385071. The reversal of 681383385064 is 460583383186.

It is a super-3 number, since 3×681383385064³ (a number of 36 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 681383384996 and 681383385014.

It is not an unprimeable number, because it can be changed into a prime (681383385061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40245769 + ... + 40262695.

It is an arithmetic number, because the mean of its divisors is an integer number (14772176880).

Almost surely, 2^681383385064 is an apocalyptic number.

It is an amenable number.

681383385064 is an abundant number, since it is smaller than the sum of its proper divisors (736745595416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

681383385064 is a wasteful number, since it uses less digits than its factorization.

681383385064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17747 (or 17726 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 55.

The spelling of 681383385064 in words is "six hundred eighty-one billion, three hundred eighty-three million, three hundred eighty-five thousand, sixty-four".